Oblique helicoidal state of the twist-bend nematic doped by chiral azo-compound
A novel light-sensitive chiral dopant ChD-3816 (an azo compound containing 4-hexanoyloxyphenyl and 2-isopropyl-5-methylcyclohexylbenzoate moieties) was used for inducing helical twisting in Ntb-forming mixtures of CB7CB/CB6OCB with 5CB added to decrease the phase transition temperatures. The effects...
Gespeichert in:
Hauptverfasser: | , , , , , , |
---|---|
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | A novel light-sensitive chiral dopant ChD-3816 (an azo compound containing
4-hexanoyloxyphenyl and 2-isopropyl-5-methylcyclohexylbenzoate moieties) was
used for inducing helical twisting in Ntb-forming mixtures of CB7CB/CB6OCB with
5CB added to decrease the phase transition temperatures. The effects of
ChD-3816 upon phase transition temperatures, as well as effects of its
concentration on the measured values of helical twisting were determined. Most
of the measured parameters could be varied due to light-induced trans-cis
isomerization of ChD-3816. Under electric field, selective reflection spectra
in the visible range were obtained for the emerging ChOH structures, with the
wavelengths controllable both by electric field and appropriate UV irradiation.
Possible applications for dynamic formation of contrast images are discussed. |
---|---|
DOI: | 10.48550/arxiv.2303.02642 |